Add bottom menu extension selection (#5352)

ui/desktop/src/components/ChatInput.tsx

@@ -11,6 +11,7 @@ import { LocalMessageStorage } from '../utils/localMessageStorage';
 import { DirSwitcher } from './bottom_menu/DirSwitcher';
 import ModelsBottomBar from './settings/models/bottom_bar/ModelsBottomBar';
 import { BottomMenuModeSelection } from './bottom_menu/BottomMenuModeSelection';
+import { BottomMenuExtensionSelection } from './bottom_menu/BottomMenuExtensionSelection';
 import { AlertType, useAlerts } from './alerts';
 import { useConfig } from './ConfigContext';
 import { useModelAndProvider } from './ModelAndProviderContext';
@@ -1590,7 +1591,12 @@ export default function ChatInput({
           </Tooltip>
           <div className="w-px h-4 bg-border-default mx-2" />
           <BottomMenuModeSelection />
-          <div className="w-px h-4 bg-border-default mx-2" />
+          {process.env.ALPHA && sessionId && (
+            <>
+              <div className="w-px h-4 bg-border-default mx-2" />
+              <BottomMenuExtensionSelection sessionId={sessionId} />
+            </>
+          )}
           <div className="flex items-center h-full">
             <Tooltip>
               <TooltipTrigger asChild>